Sampling depth bob



FIG. 1 is a right side elevational view of a sampling depth bob showingmy new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a bottom plan view thereof.

The ornamental design for a sampling depth bob, as shown.